Apparatus for manufacturing ice-cream.



2 Shees-Sheet l.

Patented lune I2, l900 Appxicacion med July 12, 1899.',

NIMH U HHH (No Model.)

ma Nonms PETERS co. meow-mmc.. wAsmNm n,

No. 65|,4I|. Patented June I2, |900. H. BIEDER.

APPARATUS FOR MANUFACTURING ICE CREAM.

(Appliation led July 12, v1.899.)

2 Sheets-Sheet 2.

(No Model.)

IIL 52612 taL;

W/)laessesl m: Norms PETERS co.. PHOTO-Limo., WASHINGTON, n. c4

- UNITED STATES PATENT OFFICE.

HERMAN BIEDER, OF ASHTABULA, OHIO.

APPARATUS FOR MANUFACTURING ICE-CREAM.

SPECIFICATION forming part of Letters Patent No. 651,411, dated June 12, 1900.

ippiiasonriea July 12, 1.899. serai No. 723,528. (No model.)

each other such that said pulley C and the I of imparting to it greater smoothness and homogeneity than has heretofore been obtained.

My improved process consists in expanding l the air or other gases which may be contained in the pores of the mixture, the methodof and apparatus for carrying out said process being hereinafter fully described.

The annexed drawings and the following description set forth in detail one mode of carrying out the invention,`such disclosed mode constituting but one of various ways in which the principle of the invention may be used.

In said annexed drawings, Figure I represents a longitudinal axial section of the freezer-can, the receptacle for containing the freezing mixture, and the dasher, the machine-frame and other parts being shown in elevation. Fig. II represents a front elevation of the freezing-mixture receptacle with a section removed, showing the freezing-can in elevation therein. Fig. III represents a vertical central cross-section of the apparatus. Fig. IV represents a detail view, and Fig. V a vertical central cross-section, looking toward the right of Fig. I; and Fig. VI an end elevation of the freezer-can.

A cylindrical receptacle A has secured to one head ct a shaft B, whose axis coincides with the receptacle-axis and which is mounted in a U-bearing B. A suitable drivingpulleyB2 is secured to said shaft. In the middle of the opposite head a' is a bearing a2, in which is journaled the end of a shaft C, also mounted in a U-bearing and driven by a pulley C. The two bearings c and c' of the U-bearing are placed at a distance from shaft O may be longitudinally moved some distance, so that the shaft may be projected a short distance into the receptacle A, as shown in dotted lines, Fig. I. Within said receptacle A and coaxial therewith is located a cylindrical freezer-can D, whose head d rests upon lugs a3, Fig. V, placed at suitable in-v tervals. The opposite head d is made removable and secured to the can by means of pivotal bolts d2 and cams d5, an elastic washer d4 being interposed to form an air-tight joint. Through the center of said removable head is formed a taper journal-bearing d5, through which extends and bears a taper journal e, formed on the end of the spindle of the dasher E, Fig. I. The opposite end of saidspindle is tapered and bears in a taper bearing d6, formed upon the inside of head d of the freezer-can, as shown.

The outer extremity of the taper journal e is secured, fits into, and rotativeljT engages the inner end of the shaft O, said shaft end be ing formed as shown in Fig. IV, the construc-v tion being such that the square spindle end may be placed in the slot 02, the shaft moved into the receptacle A, and said spindle end thereby caused to interiorly engage a square seat c3, formed in continuation of the said slot, the arrangement thereby permitting the freezer-can to be removed and replaced with facility.

A longitudinal section A of the receptacle A is made removable, Fig. III, secured by suitable means, and is of sufficient width to form on removal an opening large enough to permit of the passage ot' the can D. In the head d of said can is formed an opening which communicates with a pipe F, which connects said opening with an opening in the receptacle A, as shown in Figs. I and II. A cheek-valvef, Fig. VI, is located in said pipe and opens inwardly. The outer end of said pipe is suitably formed or provided with means for making an air-tight connection with a pipe or duct G, which communicates with any suitable source of air under pressure.

I carry out my process and operate the above-described device as follows: The freezingcan having been removed from the receptacle A and the head CZ removed, the ice-cream mixture is poured into same and the said head replaced, thus sealing the freezer and confining the mixture in an air-tight space. The can is then replaced, the dasher caused to operatively engage the shaft C, as before described, the freezing mixture placed in the receptacle A around the can, the cover A secured in place, and the said receptacle and the dasher rotated in opposite directions by means ot' the driving-pulleys,the can D rotating with the receptacle. After the mixture has congealed to a predetermined degree the rotation is stopped and the end of the pipe F connected with the compressed-air supply, such compressed air being thus injected into the icecream mixture and the internal pressure of the air or gases inthe pores of the mixture raised above the pressure of the surrounding atmosphere. The etilux of air from the can is prevented by the cheekvalvc, so that the imparted .pressure is maintained as desired. On completion of the freezing processthe can is 'removed from the receptacle A and t-he head rl removed. 0n such removal the confined gas innnediately expands throughout-the frozen mixture, causing it to expand to greater volume and imparting to it a homogeneity and smoothness desired in ice-cream.

Gther modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means covered by any one ot the following claims be employed.

I therefore particularly point out and distinctly claim as my inventionl. The combination of a can, congealine` means, a source of gas under pressure, said can having communication with said source and excluded from communication with the atmosphere, substantially as set forth. l

2. The combination of a sealed can, congealing means, a source of gas under pressure, means for connecting said can and said source of pressure whereby such gas is permitted to enter and is retained in said can, substantially as set fort-h.

3. Afreezing-canhavingaremovable cover adapted to render the can air-tight, and having an air-inlet controlled by a valve adapted to prohibit atmosphericcommunication with the interior of said can, substantially as set forth.

It. The combination of a receptacle forcontaining freezing mixture, a freezing-can Supported in and removable from said receptacle7 the latter provided with an aperture having a removable cover for permitting said can to be inserted or removed from said receptacle, and an air-duct connectingI the interior of said can with the exterior of the receptacle, said duct provided with a valve adapted to prohibit atmospheric communication with said interior, substantially as set forth.

Signed by me this 26th day of June, 18H9.

HERMAN BIEDER.

Attest:

I). T. DAvrEs,

A. E. Mannen. 

